Exons 1, 2 and 3 of a human gene are 156, 224 and 524 bp long respectively. The introns 1 and 2 are 546 bp and 466 bp respectively. a. Draw this gene showing the promoter, exons, introns and transcription initiation sites. b. This gene is found to encode two mRNAs. One of these mRNAs is 224 bp in shorter than the other. i. What is the biological process giving rise to this phenomenon called? What are the sizes of the two mRNAs (in bp) produced from this gene?
Gene Interactions
When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.
Gene Expression
Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.
Exons 1, 2 and 3 of a human gene are 156, 224 and 524 bp long respectively. The introns 1 and
2 are 546 bp and 466 bp respectively.
a. Draw this gene showing the promoter, exons, introns and transcription initiation
sites.
b. This gene is found to encode two mRNAs. One of these mRNAs is 224 bp in shorter than
the other.
i. What is the biological process giving rise to this phenomenon called?
What are the sizes of the two mRNAs (in bp) produced from this gene?
Introduction :-
Exons are the coding regions of an RNA transcript or the DNA that codes for it that are translated into protein. Exons are separated by introns, which are regions of DNA that do not code for proteins. New, immature strands of messenger RNA, known as pre-mRNA, can include both introns and exons during transcription.
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